The most common cause of retinal detachment is a blow to the head.
a. true
b. false
Answer: a. true
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Which of the following would represent the "transformation principal" first proposed by Griffith through his studies on Streptococcus pneumoniae bacterium
A. protein B. RNA C. DNA D. phage E. bateriophage
What explains the coloration of giant kelp?
A. It facilitates absorption of the blue-green light prevalent in their environment. B. It facilitates absorption of the brown light prevalent in their environment. C. It warns grazers of their toxic properties. D. It camouflages them from grazers. E. It is the result of waste products stored in the tissues.
Through meiosis
a. alternate forms of genes are shuffled. b. parental DNA is divided and distributed to forming gametes. c. the diploid chromosome number is reduced to haploid. d. offspring are provided with new gene combinations. e. all of these occur.
Crop sunflowers are attacked by many fungal pathogens, such as downy mildew and Sclerotinia, resulting in economic losses of millions of dollars per year. What genes would be best to target for the development of new fungus-killing crop treatments (fungicides)?
A. genes encoding chitin proteins that are shared by downy mildew and Sclerotinia, but absent in sunflower and humans B. genes encoding metabolite proteins that are shared by downy mildew, Sclerotinia, and humans, but absent in sunflower C. genes encoding basic development proteins that are shared by downy mildew, Sclerotinia, sunflower, and humans D. genes encoding growth proteins that are shared by downy mildew, Sclerotinia, and sunflower, but absent in humans